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What are the differences between indoor optical cables OM1, OM2, OM3, and OM4?
Date: 2022-07-26Read: 10
“OM”stand for optical multi-mode， The optical mode is the standard for representing the fiber grade of multimode optical fibers. The bandwidth and maximum distance of transmission at different levels are different. Analyze the differences between them from the following aspects.
1、 Comparison of parameters and specifications of OM1, OM2, OM3, and OM4 optical fibers:
1. OM1 refers to a 50um or 62.5um core diameter multimode fiber with a full injection bandwidth of 850/1300nm and above 200/500MHz.km;
2. OM2 refers to a 50um or 62.5um core diameter multimode fiber with a full injection bandwidth of 850/1300nm and above 500/500MHz.km;
3. OM3 is a 50um core diameter multimode fiber optimized for 850nm laser. In 10Gb/s Ethernet using 850nm VCSEL, the fiber transmission distance can reach 300m;
4. OM4 is an upgraded version of OM3 multimode fiber, with a fiber transmission distance of up to 550m.
1、 Comparison of parameters and specifications of OM1, OM2, OM3, and OM4 optical fibers:
1. OM1 refers to a 50um or 62.5um core diameter multimode fiber with a full injection bandwidth of 850/1300nm and above 200/500MHz.km;
2. OM2 refers to a 50um or 62.5um core diameter multimode fiber with a full injection bandwidth of 850/1300nm and above 500/500MHz.km;
3. OM3 is a 50um core diameter multimode fiber optimized for 850nm laser. In 10Gb/s Ethernet using 850nm VCSEL, the fiber transmission distance can reach 300m;
4. OM4 is an upgraded version of OM3 multimode fiber, with a fiber transmission distance of up to 550m.
2、 Design comparison of OM1, OM2, OM3, and OM4 optical fibers
1. Traditional OM1 and OM2 multimode optical fibers are based on LED (Light Emitting Diode) as the light source in both standard and design, while OM3 and OM4 are optimized based on OM2 to be suitable for transmission with LD (Laser Diode) as the light source;
2. Compared with OM1 and OM2, OM3 has a higher transmission rate and bandwidth, so it is called optimized multimode fiber or 10 gigabit multimode fiber;
3. OM4 has been further optimized based on OM3, resulting in better performance.
3、 Comparison of Functions and Characteristics of OM1, OM2, OM3, and OM4 Optical Fibers
1. OM1: The core diameter and numerical aperture are relatively large, with strong light collection ability and anti bending characteristics;
2. OM2: The core diameter and numerical aperture are relatively small, effectively reducing the mode dispersion of multimode fibers, significantly increasing bandwidth, and reducing production costs by one-third;
3. OM3: Equipped with a flame-retardant outer layer, it can prevent the spread of flames, prevent the emission of smoke, acidic gases, and toxic gases, and meet the requirement of a transmission rate of 10 GB/s;
4. OM4: Developed for VSCEL laser transmission, with an effective bandwidth more than twice that of OM3.
1. Traditional OM1 and OM2 multimode optical fibers are based on LED (Light Emitting Diode) as the light source in both standard and design, while OM3 and OM4 are optimized based on OM2 to be suitable for transmission with LD (Laser Diode) as the light source;
2. Compared with OM1 and OM2, OM3 has a higher transmission rate and bandwidth, so it is called optimized multimode fiber or 10 gigabit multimode fiber;
3. OM4 has been further optimized based on OM3, resulting in better performance.
3、 Comparison of Functions and Characteristics of OM1, OM2, OM3, and OM4 Optical Fibers
1. OM1: The core diameter and numerical aperture are relatively large, with strong light collection ability and anti bending characteristics;
2. OM2: The core diameter and numerical aperture are relatively small, effectively reducing the mode dispersion of multimode fibers, significantly increasing bandwidth, and reducing production costs by one-third;
3. OM3: Equipped with a flame-retardant outer layer, it can prevent the spread of flames, prevent the emission of smoke, acidic gases, and toxic gases, and meet the requirement of a transmission rate of 10 GB/s;
4. OM4: Developed for VSCEL laser transmission, with an effective bandwidth more than twice that of OM3.
4、 Application comparison of OM1, OM2, OM3, and OM4 optical fibers
1. OM1 and OM2 have been widely deployed in applications inside buildings for many years, supporting Ethernet transmission up to 1GB;
2. OM3 and OM4 optical cables are commonly used in data center cabling environments, supporting transmission over 10G or even 40/100G high-speed Ethernet routes.
5、 When to use OM3 fiber optic jumpers?
OM3 fiber is designed to work in conjunction with VCSEL and complies with the OM-3 fiber specification of ISO/IEC 11801-2nd, meeting the requirements of 10 Gigabit Ethernet applications. There are various types of OM3 optical fibers, including indoor type and indoor/outdoor universality, with fiber cores ranging from 4 to 48. In addition, it also supports all applications based on old multi-mode 50/125 fiber optic, including support for LED light sources and laser light sources.
1. OM1 and OM2 have been widely deployed in applications inside buildings for many years, supporting Ethernet transmission up to 1GB;
2. OM3 and OM4 optical cables are commonly used in data center cabling environments, supporting transmission over 10G or even 40/100G high-speed Ethernet routes.
5、 When to use OM3 fiber optic jumpers?
OM3 fiber is designed to work in conjunction with VCSEL and complies with the OM-3 fiber specification of ISO/IEC 11801-2nd, meeting the requirements of 10 Gigabit Ethernet applications. There are various types of OM3 optical fibers, including indoor type and indoor/outdoor universality, with fiber cores ranging from 4 to 48. In addition, it also supports all applications based on old multi-mode 50/125 fiber optic, including support for LED light sources and laser light sources.
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